linux-kernel - Re: [PATCH 0/5] Some vmevent fixes...

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Message-ID: <CAOJsxLEeHR8MLAGteN_noU9Ncc+Q4eMVhQO7yDwxLQTTXrjJog@mail.gmail.com>
Date:	Fri, 8 Jun 2012 09:57:09 +0300
From:	Pekka Enberg <penberg@...nel.org>
To:	KOSAKI Motohiro <kosaki.motohiro@...il.com>
Cc:	Anton Vorontsov <cbouatmailru@...il.com>,
	Minchan Kim <minchan@...nel.org>,
	Leonid Moiseichuk <leonid.moiseichuk@...ia.com>,
	John Stultz <john.stultz@...aro.org>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, linaro-kernel@...ts.linaro.org,
	patches@...aro.org, kernel-team@...roid.com
Subject: Re: [PATCH 0/5] Some vmevent fixes...

On Fri, Jun 8, 2012 at 6:45 AM, KOSAKI Motohiro
<kosaki.motohiro@...il.com> wrote:
> So, big design choice here. 1) vmevent is a just notification. it can't
> guarantee to prevent oom. or 2) to implement some trick (e.g. reserved
> memory for vmevent processes, kernel activity blocking until finish
> memory returing, etc)

Yes, vmevent is only for notification and will not *guarantee* OOM
prevention. It simply tries to provide hints early enough to the
userspace to so that OOM can be avoided if possible.
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